 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.internal.ui.wizards;

 import java.lang.reflect.*;
 import java.util.ArrayList ;

 import org.eclipse.core.runtime.*;
 import org.eclipse.jface.dialogs.*;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.operation.*;
 import org.eclipse.jface.viewers.*;
 import org.eclipse.jface.wizard.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.custom.*;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.*;
 import org.eclipse.update.configuration.*;
 import org.eclipse.update.core.*;
 import org.eclipse.update.core.model.*;
 import org.eclipse.update.internal.core.*;
 import org.eclipse.update.internal.ui.*;
 import org.eclipse.update.operations.*;


 public class RevertConfigurationWizardPage extends WizardPage {

     private TableViewer activitiesViewer;
     private TableViewer configViewer;
     public static Color blueBGColor;
     private SashForm sashForm;

     public RevertConfigurationWizardPage() {
         super("RevertConfiguration"); //$NON-NLS-1$
 setTitle(UpdateUIMessages.RevertConfigurationWizardPage_title);
         setDescription(UpdateUIMessages.RevertConfigurationWizardPage_desc);
         blueBGColor = new Color(null, 238,238,255);
         
     }

     public void createControl(Composite parent) {
         sashForm = new SashForm(parent, SWT.VERTICAL);
         sashForm.setLayout(new GridLayout());
         sashForm.setLayoutData(new GridData(GridData.FILL_BOTH));

         createConfigurationsSection(sashForm);
         createActivitiesSection(sashForm);
         setControl(sashForm);

         Object element = configViewer.getElementAt(0);
         if (element != null)
             configViewer.setSelection(new StructuredSelection(element));
         Dialog.applyDialogFont(sashForm);
     }

     private void createConfigurationsSection(Composite parent) {
         Composite tableContainer = new Composite(parent, SWT.NONE);
         GridLayout layout = new GridLayout();
         layout.marginHeight = layout.marginWidth = 0;
         tableContainer.setLayout(layout);
         tableContainer.setLayoutData(new GridData(GridData.FILL_BOTH));

         Label label = new Label(tableContainer, SWT.NONE);
         label.setText(UpdateUIMessages.RevertConfigurationWizardPage_label);

         Table table = new Table(tableContainer, SWT.BORDER | SWT.V_SCROLL);
         table.setLayoutData(new GridData(GridData.FILL_BOTH));

         configViewer = new TableViewer(table);
         configViewer.setLabelProvider(new LabelProvider() {
             public Image getImage(Object element) {
                 UpdateLabelProvider provider =
                     UpdateUI.getDefault().getLabelProvider();
                 return provider.get(UpdateUIImages.DESC_CONFIG_OBJ, 0);
             }
             public String getText(Object element) {
                 return Utilities.format(
                     ((IInstallConfiguration) element).getCreationDate());
             }

         });
         configViewer.setContentProvider(new IStructuredContentProvider() {
             public Object [] getElements(Object element) {
                 ArrayList result = new ArrayList ();
                 ILocalSite localSite = (ILocalSite) element;
                 IInstallConfiguration current = localSite.getCurrentConfiguration();
                 IInstallConfiguration[] configurations = localSite.getConfigurationHistory();
                 for (int i = configurations.length - 1; i >= 0; i--) {
                     if (!current.equals(configurations[i])) {
                         result.add(configurations[i]);
                     }
                 }
                 return result.toArray();
             }
             
             public void dispose() {
             }

             public void inputChanged(
                 Viewer viewer,
                 Object oldInput,
                 Object newInput) {
             }

         });

         configViewer
             .addSelectionChangedListener(new ISelectionChangedListener() {
             public void selectionChanged(SelectionChangedEvent e) {
                 IStructuredSelection ssel = (IStructuredSelection) e.getSelection();
                 InstallConfiguration currentConfig = (InstallConfiguration)ssel.getFirstElement();
                 activitiesViewer.setInput(currentConfig);
                 activitiesViewer.refresh();
                 TableItem[] items = activitiesViewer.getTable().getItems();
                 for (int i =0; i<items.length; i++){
                     IActivity activity = (IActivity)items[i].getData();
                     // for now, we test exact config match. If needed, we can also compare dates, etc.
 if (((InstallConfiguration)activity.getInstallConfiguration()).equals(currentConfig))
                         items[i].setBackground(blueBGColor);
                     else
                         items[i].setBackground(activitiesViewer.getControl().getBackground());
                 }
             }
         });

         try {
             configViewer.setInput(SiteManager.getLocalSite());
         } catch (CoreException e1) {
         }
     }

     private void createActivitiesSection(Composite parent) {
         final Composite composite = new Composite(parent, SWT.NONE);
         GridLayout gridLayout = new GridLayout();
         gridLayout.marginHeight = gridLayout.marginWidth = 0;
         composite.setLayout(gridLayout);
         GridData gd = new GridData(GridData.FILL_BOTH);
         composite.setLayoutData(gd);



         Label label = new Label(composite, SWT.NONE);
         label.setText(
             UpdateUIMessages.RevertConfigurationWizardPage_activities);

         TableLayoutComposite tlComposite= new TableLayoutComposite(composite, SWT.NONE);
         tlComposite.setLayoutData(new GridData(GridData.FILL_BOTH));
         activitiesViewer = ActivitiesTableViewer.createViewer(tlComposite, false);

         tlComposite.addColumnData(new ColumnPixelData(16, true, true));
         tlComposite.addColumnData(new ColumnWeightData(2, 150, true));
         tlComposite.addColumnData(new ColumnWeightData(5, 200, true));
         tlComposite.addColumnData(new ColumnWeightData(4, 100, true));

         //activitiesViewer.getTable().setLayout(layout);

         TableItem[] configs = configViewer.getTable().getItems();
         if (configs.length >0)
             activitiesViewer.setInput(configs[0].getData());
         
         composite.addControlListener(new ControlAdapter() {
             public void controlResized(ControlEvent e) {
                 int sashHeight = getSashForm().getSize().y;
                 int sashWidth = getSashForm().getSize().x;
                 if (composite.getSize().y > (sashHeight*0.85) && composite.getSize().x > (sashWidth*0.5)){
                     getSashForm().setOrientation(SWT.HORIZONTAL);
                 } else {
                     getSashForm().setOrientation(SWT.VERTICAL);
                 }
             }
         });
     }

     /* (non-Javadoc)
      * @see org.eclipse.jface.dialogs.IDialogPage#dispose()
      */
     public void dispose() {
         blueBGColor.dispose();
     }
     
     public SashForm getSashForm(){
         return sashForm;
     }
     public boolean performFinish() {
         Shell shell = getContainer().getShell();
         boolean result =
             MessageDialog.openQuestion(
                 shell,
                 shell.getText(),
                 UpdateUIMessages.RevertConfigurationWizardPage_question);
         if (!result)
             return false;

         boolean finish = performRevert();
         if (finish) {
             PlatformUI.getWorkbench().restart();
         }
         return finish;
     }

     public boolean performRevert() {

         IStructuredSelection ssel =
             (IStructuredSelection) configViewer.getSelection();
         final IInstallConfiguration target =
             (IInstallConfiguration) ssel.getFirstElement();

         IStatus status =
             OperationsManager.getValidator().validatePendingRevert(target);
         if (status != null && status.getCode() == IStatus.ERROR) {
             ErrorDialog.openError(
                 UpdateUI.getActiveWorkbenchShell(),
                 null,
                 null,
                 status);
             return false;
         }

         IRunnableWithProgress operation = new IRunnableWithProgress() {
             public void run(IProgressMonitor monitor)
                 throws InvocationTargetException {
                 IOperation revertOperation =
                     OperationsManager
                         .getOperationFactory()
                         .createRevertConfigurationOperation(
                         target,
                         new UIProblemHandler());
                 try {
                     revertOperation.execute(monitor, null);
                 } catch (CoreException e) {
                     throw new InvocationTargetException(e);
                 } finally {
                     monitor.done();
                 }
             }
         };
         try {
             getContainer().run(false, true, operation);
             return true;
         } catch (InvocationTargetException e) {
             Throwable targetException = e.getTargetException();
             if (targetException instanceof InstallAbortedException) {
                 return true;
             } else {
                 UpdateUI.logException(e);
             }
             return false;
         } catch (InterruptedException e) {
             return false;
         }
     }
 }

